Shown with a cast-on count of 21 stitches.  

• Row 1 (RS): K2tog, [yo] twice, sl1-k2tog-psso, yo, k2tog, k2, k2tog, yo, k3, yo, sl1-k2tog-psso, yo, k4 (20 sts).
• Row 2: Yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, k1, k2tog, yo, k3, k2tog, yo, k2, p1, k1.
• Row 3: K2tog, [yo] twice, k2tog, yo, k1, yo, k2tog, k3, yo, sl1-k2tog-psso, yo, k3, yo, k2tog, k2 (21 sts).
• Row 4: Yo, k2tog, k1, yo, k2tog, k1, k2tog, yo, k4, k2tog, yo, k3, yo, k2, p1, k1 (22 sts).
• Row 5: K2tog, [yo] twice, k2tog, yo, k5, yo, k2tog, k4, yo, sl1-k2tog-psso, yo, k4 (23 sts).
• Row 6: Yo, k2tog, k8, k2tog, yo, k7, yo, k2, p1, k1 (24 sts).
• Row 7: K2tog, [yo] twice, k2tog, yo, k2, k2tog, yo, k1, yo, k2tog, k2, yo, k2tog, k9 (25 sts).
• Row 8: Yo, k2tog, k6, k2tog, yo, k2, k2tog, yo, k3, yo, k2tog, k2, yo, k2, p1, k1 (26 sts).
• Row 9: K2tog, [yo] twice, k2tog, yo, k1, yo, k2tog, k1, yo, k2tog, k1, k2tog, yo, k1, k2tog, yo, k1, yo, k2tog, k7 (27 sts).
• Row 10: Yo, k2tog, k4, k2tog, yo, k3, yo, k2tog, k1, yo, sl1-k2tog-psso, yo, k1, k2tog, yo, k3, yo, k2, p1, k1 (28 sts).
• Row 11: K2tog, [yo] twice, k2tog, yo, k5, yo, k2tog, k3, k2tog, yo, k5, yo, k2tog, k5 (29 sts).
• Row 12: Yo, k2tog, k2, k2tog, yo, k7, yo, k2tog, k1, k2tog, yo, k7, yo, k2, p1, k1 (30 sts).
• Row 13: K2tog, [yo] twice, k2tog, yo, k2, k2tog, yo, k1, yo, k2tog, k2, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k1, yo, k2tog, k2, yo, k2tog, k3 (31 sts).
• Row 14: Yo, [k2tog] twice, yo, k2, k2tog, yo, k3, yo, k2tog, k2, yo, k1, yo, k2, k2tog, yo, k3, yo, k2tog, k2, yo, k2, p1, k1 (34 sts).
• Row 15: K2tog, [yo] twice, sl1-k2tog-psso, *yo, k2tog, k1, yo, k2tog, k1, k2tog, yo, k1, k2tog, yo, k3, repeat from * to last st, k1 (33 sts).
• Row 16: Yo, k2tog, k3, yo, k2tog, k1, yo, sl1-k2tog-psso, yo, k1, k2tog, yo, k5, yo, k2tog, k1, yo, sl1-k2tog-psso, yo, k1, k2tog, yo, k2tog, k1, p1, k1 (32 sts).
• Row 17: K2tog, [yo] twice, sl1-k2tog-psso, yo, k2tog, k3, k2tog, yo, k7, yo, k2tog, k3, k2tog, yo, k6 (31 sts).
• Row 18: Yo, k2tog, k5, yo, k2tog, k1, k2tog, yo, k2, k2tog, yo, k1, yo, k2tog, k2, yo, k2tog, k1, k2tog, yo, sl1-k2tog-psso, p1, k1 (29 sts).
• Row 19: K2tog, [yo] twice, k2tog, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k3, yo, k2tog, k2, yo, sl1-k2tog-psso, yo, k8.
• Row 20: Yo, k2tog, k1, yo, k2tog, k6, yo, k2tog, k1, yo, k2tog, k1, k2tog, yo, k1, k2tog, yo, sl1-k2tog-psso, k2tog, p1, k1 (26 sts).
• Row 21: K2tog, [yo] twice, sl1-k2tog-psso, yo, k2tog, k1, yo, sl1-k2tog-psso, yo, k1, k2tog, yo, k6, k2tog, yo, k4 (25 sts).
• Row 22: Yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, k5, yo, k2tog, k3, k2tog, yo, k2tog, k1, p1, k1 (24 sts).
• Row 23: K2tog, [yo] twice, sl1-k2tog-psso, yo, k2tog, k1, k2tog, yo, k5, k2tog, yo, k3, yo, k2tog, k2 (23 sts).
• Row 24: Yo, k2tog, k1, yo, k2tog, k1, k2tog, yo, k1, yo, k2tog, k4, [yo, sl1-k2tog-psso] twice, p1, k1 (21 sts).